code: def test_save_rankings_plot(self, rankings_plot_data_1):
      lm_plots.plot_inner_token_rankings(
          **rankings_plot_data_1, save_file_path="./tmp/ranking_1.png"
      )
  
file_path: ecco/tests/lm_plots_test.py
imports: import pytest
  import numpy
  from ecco import lm_plots
  import os
label_desc: Use image node_id 1 for calling the TestLMPlots obj's underlying member method code with example usage: obj.test_save_rankings_plot(rankings_plot_data_1) without return types